public function export(SimpleXMLElement $artifact_xml, SimpleXMLElement $changeset_xml, Tracker_Artifact $artifact, Tracker_Artifact_ChangesetValue $changeset_value)
{
/* @var $exporter Tracker_XML_Exporter_ChangesetValue_ChangesetValueXMLExporter */
$exporter = $changeset_value->accept($this);
$exporter->export($artifact_xml, $changeset_xml, $artifact, $changeset_value);
}
